κ—ε湍流模型可压缩性修正在超音速混合层中的应用研究  

AN INVESTIGATION OF COMPRESSIBILITY MODIFICATION FOR k-ε TURBULENCE MODEL AND APPLICATION IN SUPERSONIC MIXING LAYERS

作　　者：韩省思[1] 叶桃红[1] 朱旻明[1] 陈义良[1] 

机构地区：[1]中国科学技术大学 热科学和能源工程系,安徽合肥230027

出　　处：《工程热物理学报》2007年第6期1053-1055,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学(No.50506028)

摘　　要：对标准k-ε两方程湍流模型进行Durbin可实现性、Heinz湍流产生项以及Sarkar可压缩性修正三部分修正。尝试考虑结构可压缩性修正的影响,发展了一个同时考虑结构可压缩性修正和膨胀可压缩性修正的湍流模型。以超音速混合层为基础,分析了各个可压缩性修正的相对重要性,并将混合层厚度增长率、湍流动能的计算结果与实验结果进行比较,验证、分析修正模型的效果。结果表明,修正模型能够准确地预测到超音速混合层的发展,使模拟结果和实验结果更加接近。Three modifications are added to improve the standard κ-ε turbulence model. They are Durbin realizable, Heinz turbulence production and Sarkar compressibility correction terms. Considering structural compressibility modification, a new model considering structural compressibility and dilatational compressibility modifications all together was proposed. Based on supersonic mixing layers, relative importance of the modifications was analyzed. Comparing the mixing layer growth rate, turbulent kinetic energy with experiment data, the modified model was validated and analyzed. Results show that the new model can reveal the growth compression of supersonic mixing layers and make simulation results closer to experiment data.

关 键 词：可压缩湍流 超音速混合层 湍流模型 数值模拟 

分 类 号：O357.5[理学—流体力学]